:root {
  color-scheme: dark;
  --bg: #09111f;
  --bg-soft: #0f1a2d;
  --panel: rgba(10, 20, 37, 0.88);
  --border: rgba(139, 180, 255, 0.18);
  --text: #ecf3ff;
  --muted: #93a7c4;
  --accent: #7c9cff;
  --accent-2: #51d6b6;
  --danger: #ff8f8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(124, 156, 255, 0.22), transparent 30%),
    radial-gradient(circle at top right, rgba(81, 214, 182, 0.18), transparent 25%),
    var(--bg);
  color: var(--text);
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 28px auto;
}

.hero-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(16px);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.25);
}

.hero-card {
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(28px, 4vw, 44px);
}

.subtitle {
  margin-top: 10px;
  color: var(--muted);
  max-width: 680px;
}

.grid-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
}

.panel {
  padding: 20px;
}

.panel-wide {
  grid-column: 1 / -1;
}

.panel.panel-wide {
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(124, 156, 255, 0.16);
  color: #cfe0ff;
  font-size: 13px;
}

.primary-btn,
.ghost-btn,
.danger-btn {
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  font: inherit;
  cursor: pointer;
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #5fd4ff);
  color: #081018;
  font-weight: 700;
}

.ghost-btn {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.danger-btn {
  background: rgba(255, 143, 143, 0.14);
  color: #ffd8d8;
  border: 1px solid rgba(255, 143, 143, 0.2);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hint {
  color: var(--muted);
  margin: 12px 0 16px;
  line-height: 1.5;
}

.account-box {
  margin-bottom: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.account-box.is-empty {
  color: var(--muted);
}

.account-line + .account-line {
  margin-top: 8px;
}

.account-label {
  color: var(--muted);
  font-size: 13px;
  margin-right: 8px;
}

.qr-box {
  min-height: 320px;
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.03);
}

.qr-box img {
  width: min(100%, 320px);
  height: auto;
  display: block;
  background: white;
  border-radius: 12px;
  padding: 10px;
}

.qr-box.is-empty {
  color: var(--muted);
}

.friends-list {
  display: grid;
  gap: 10px;
  max-height: 520px;
  overflow: auto;
}

.friend-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.friend-item.is-active {
  border-color: rgba(124, 156, 255, 0.42);
  background: rgba(124, 156, 255, 0.12);
}

.friend-item button {
  border: 0;
  border-radius: 10px;
  padding: 8px 12px;
  background: rgba(81, 214, 182, 0.18);
  color: #dffff7;
  cursor: pointer;
}

.friend-name {
  font-weight: 600;
}

.friend-id {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

.send-form {
  display: grid;
  gap: 14px;
}

.chat-layout {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 18px;
}

.chat-sidebar,
.chat-panel {
  min-height: 560px;
  height: 560px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.chat-sidebar {
  padding: 14px;
}

.chat-sidebar-head,
.chat-panel-head {
  padding: 4px 4px 14px;
}

.chat-title {
  font-size: 18px;
  font-weight: 700;
}

.chat-meta {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.chat-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
}

.messages-list {
  min-height: 0;
  max-height: 100%;
  overflow: auto;
  padding: 10px 16px 16px;
  display: grid;
  gap: 10px;
}

.chat-empty {
  color: var(--muted);
  align-self: center;
}

.message-bubble {
  max-width: min(75%, 560px);
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.message-bubble.is-outgoing {
  justify-self: end;
  background: rgba(124, 156, 255, 0.18);
  border-color: rgba(124, 156, 255, 0.3);
}

.message-bubble.is-incoming {
  justify-self: start;
}

.message-text {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

.message-content {
  display: grid;
  gap: 8px;
}

.message-image {
  display: block;
  width: min(100%, 280px);
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.message-time {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

.chat-composer {
  padding: 14px 16px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  gap: 12px;
}

.composer-field {
  display: grid;
  gap: 8px;
}

.composer-field span {
  color: var(--muted);
  font-size: 14px;
}

.composer-actions {
  display: flex;
  justify-content: flex-end;
}

.send-form label {
  display: grid;
  gap: 8px;
}

.send-form span {
  color: var(--muted);
  font-size: 14px;
}

.send-form input,
.send-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: var(--bg-soft);
  color: var(--text);
  font: inherit;
  padding: 12px 14px;
}

.result-box {
  margin-top: 16px;
  min-height: 140px;
  white-space: pre-wrap;
  word-break: break-word;
  border-radius: 16px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.22);
  color: #d8ecff;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

@media (max-width: 900px) {
  .grid-layout {
    grid-template-columns: 1fr;
  }

  .hero-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .chat-layout {
    grid-template-columns: 1fr;
  }

  .chat-sidebar,
  .chat-panel {
    min-height: auto;
    height: auto;
  }

  .messages-list {
    max-height: 420px;
  }
}